Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Hydrogen Embrittlement Behavior of High Mn TRIP/TWIP Steels

고 Mn계 TRIP/TWIP 강의 수소취성 거동

  • 정종구 (전북대학교 신소재공학부 신소재개발연구센터) ;
  • 이오연 (전북대학교 신소재공학부 신소재개발연구센터) ;
  • 박영구 (전북대학교 신소재공학부 신소재개발연구센터) ;
  • 김동은 (HYSCO 기술연구소) ;
  • 진광근 (POSCO 기술연구소)
  • Published : 2008.07.27
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Abstract

The hydrogen embrittlement susceptibility of high strength TRIP/TWIP steels with the tensile strength of 600Mpa to 900Mpa grade was investigated using cathodically hydrogen charged specimens. TWIP steels with full austenite structure show a lower hydrogen content than do TRIP steels. The uniform distribution of strong traps throughout the matrix in the form of austenite is considered beneficial to reduce the hydrogen embrittlement susceptibility of TWIP steels. Moreover, an austenite structure with very fine deformation twins formed during straining could also improve the ductility and reduce notch sensitivity. In Ubend and deep drawing cup tests, TWIP steels show a good resistance to hydrogen embrittlement compared with TRIP steels.

Keywords

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